[Xen-devel] [PATCH 13 of 25] libxc: convert mca interface over to hypercall buffers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1287650255 -3600
# Node ID 2ef7e26cabd8919f5797a22dbd070a4a189063f1
# Parent  a688a8de1cf73954974b9dcc46304e9dcc981068
libxc: convert mca interface over to hypercall buffers

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r a688a8de1cf7 -r 2ef7e26cabd8 tools/libxc/xc_misc.c
--- a/tools/libxc/xc_misc.c     Thu Oct 21 09:37:35 2010 +0100
+++ b/tools/libxc/xc_misc.c     Thu Oct 21 09:37:35 2010 +0100
@@ -153,18 +153,19 @@ int xc_mca_op(xc_interface *xch, struct 
 {
     int ret = 0;
     DECLARE_HYPERCALL;
+    DECLARE_HYPERCALL_BOUNCE(mc, sizeof(*mc), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
 
+    if ( xc_hypercall_bounce_pre(xch, mc) )
+    {
+        PERROR("Could not bounce xen_mc memory buffer");
+        return -1;
+    }
     mc->interface_version = XEN_MCA_INTERFACE_VERSION;
-    if ( lock_pages(xch, mc, sizeof(*mc)) )
-    {
-        PERROR("Could not lock xen_mc memory");
-        return -EINVAL;
-    }
 
     hypercall.op = __HYPERVISOR_mca;
-    hypercall.arg[0] = (unsigned long)mc;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(mc);
     ret = do_xen_hypercall(xch, &hypercall);
-    unlock_pages(xch, mc, sizeof(*mc));
+    xc_hypercall_bounce_post(xch, mc);
     return ret;
 }
 #endif

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